Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Dirk J. Gouma and Huug Obertop,Acute Calculous Cholecystitis: What is new in diagnosis and therapy?,HPB Surgery,0894-8569,Wiley,1992-01,6,2,69-78,https://cir.nii.ac.jp/crid/1360292619524876928,https://doi.org/10.1155/1992/46529